import pytest
import requests
import json
from typing import Dict, Any, List
import time
from unittest.mock import patch
import requests_mock

# 配置信息（全部使用模拟值）
CONFIG = {
    "secret_id": "mock-secret-id",
    "secret_key": "mock-secret-key",
    "region": "ap-guangzhou",
    "api_url": "https://cvm.tencentcloudapi.com/",
    "valid_placement_group_id": "pg-test-valid-123456",  # 有效群组ID
    "invalid_placement_group_id": "pg-test-invalid-123456",  # 无效群组ID
    "non_empty_placement_group_id": "pg-test-non-empty-123456",  # 非空群组ID
}


def generate_signature(params: Dict[str, Any]) -> str:
    """生成API请求签名（模拟实现）"""
    return "mock-signature"


def delete_placement_group(placement_group_ids: List[str]) -> Dict[str, Any]:
    """删除分散置放群组"""
    params = {
        "Action": "DeletePlacementGroup",
        "Version": "2017-03-12",
        "Region": CONFIG["region"],
        "SecretId": CONFIG["secret_id"],
        "Timestamp": int(time.time()),
        "Nonce": int(time.time() * 1000),
    }

    for i, group_id in enumerate(placement_group_ids):
        params[f"PlacementGroupIds.{i}"] = group_id

    params["Signature"] = generate_signature(params)
    response = requests.post(CONFIG["api_url"], data=params)
    return response.json()


# 测试用例
class TestTencentCloudDeletePlacementGroup:
    @pytest.fixture
    def mock_request(self):
        with requests_mock.Mocker() as m:
            yield m

    def test_success(self, mock_request):
        """测试成功删除分散置放群组"""
        mock_response = {
            "Response": {
                "RequestId": "mock-request-id"
            }
        }

        mock_request.post(CONFIG["api_url"], json=mock_response)

        result = delete_placement_group([CONFIG["valid_placement_group_id"]])
        assert "Response" in result
        assert "Error" not in result["Response"]

    def test_invalid_placement_group_id(self, mock_request):
        """测试无效的分散置放群组ID"""
        mock_response = {
            "Response": {
                "Error": {
                    "Code": "InvalidPlacementGroup.NotFound",
                    "Message": "The specified placement group does not exist."
                },
                "RequestId": "mock-request-id"
            }
        }

        mock_request.post(CONFIG["api_url"], json=mock_response)

        result = delete_placement_group([CONFIG["invalid_placement_group_id"]])
        assert "Response" in result
        assert "Error" in result["Response"]
        assert result["Response"]["Error"]["Code"] == "InvalidPlacementGroup.NotFound"

    def test_missing_required_parameter(self, mock_request, delete_placement_group=None):
        """测试缺少必要参数"""
        mock_response = {
            "Response": {
                "Error": {
                    "Code": "InvalidParameter",
                    "Message": "PlacementGroupIds parameter is required."
                },
                "RequestId": "mock-request-id"
            }
        }

        # 修改函数内部行为，移除必要参数
        original_function = delete_placement_group

        def mock_function(*args, **kwargs):
            params = {
                "Action": "DeletePlacementGroup",
                "Version": "2017-03-12",
                "Region": CONFIG["region"],
                # 缺少PlacementGroupIds参数
                "SecretId": CONFIG["secret_id"],
                "Timestamp": int(time.time()),
                "Nonce": int(time.time() * 1000),
            }
            params["Signature"] = generate_signature(params)
            response = requests.post(CONFIG["api_url"], data=params)
            return response.json()

        delete_placement_group = mock_function

        try:
            mock_request.post(CONFIG["api_url"], json=mock_response)
            result = delete_placement_group([])
            assert "Response" in result
            assert "Error" in result["Response"]
            assert result["Response"]["Error"]["Code"] == "InvalidParameter"
        finally:
            delete_placement_group = original_function

    def test_placement_group_not_empty(self, mock_request):
        """测试删除非空的分散置放群组"""
        mock_response = {
            "Response": {
                "Error": {
                    "Code": "OperationDenied.PlacementGroupNotEmpty",
                    "Message": "The placement group is not empty. Please remove all instances first."
                },
                "RequestId": "mock-request-id"
            }
        }

        mock_request.post(CONFIG["api_url"], json=mock_response)

        result = delete_placement_group([CONFIG["non_empty_placement_group_id"]])
        assert "Response" in result
        assert "Error" in result["Response"]
        assert result["Response"]["Error"]["Code"] == "OperationDenied.PlacementGroupNotEmpty"

    def test_multi_group_success(self, mock_request):
        """测试批量删除多个分散置放群组"""
        mock_response = {
            "Response": {
                "RequestId": "mock-request-id"
            }
        }

        mock_request.post(CONFIG["api_url"], json=mock_response)

        result = delete_placement_group([
            f"pg-test-batch-{i}" for i in range(3)
        ])
        assert "Response" in result
        assert "Error" not in result["Response"]

    def test_multi_group_partial_invalid(self, mock_request):
        """测试批量删除包含无效ID的情况"""
        mock_response = {
            "Response": {
                "Error": {
                    "Code": "InvalidPlacementGroup.NotFound",
                    "Message": "One or more of the specified placement groups do not exist."
                },
                "RequestId": "mock-request-id"
            }
        }

        mock_request.post(CONFIG["api_url"], json=mock_response)

        result = delete_placement_group([
            CONFIG["valid_placement_group_id"],
            CONFIG["invalid_placement_group_id"]
        ])
        assert "Response" in result
        assert "Error" in result["Response"]
        assert result["Response"]["Error"]["Code"] == "InvalidPlacementGroup.NotFound"

    def test_exceed_max_group_count(self, mock_request):
        """测试超出最大批量删除数量限制"""
        mock_response = {
            "Response": {
                "Error": {
                    "Code": "InvalidParameterValue",
                    "Message": "You can specify up to 100 placement groups at a time."
                },
                "RequestId": "mock-request-id"
            }
        }

        # 创建超过限制数量的群组ID列表
        group_ids = [f"pg-test-exceed-{i}" for i in range(101)]  # 假设限制为100

        mock_request.post(CONFIG["api_url"], json=mock_response)

        result = delete_placement_group(group_ids)
        assert "Response" in result
        assert "Error" in result["Response"]
        assert result["Response"]["Error"]["Code"] == "InvalidParameterValue"

    def test_insufficient_permissions(self, mock_request):
        """测试权限不足"""
        mock_response = {
            "Response": {
                "Error": {
                    "Code": "AuthFailure.UnauthorizedOperation",
                    "Message": "You are not authorized to perform this operation."
                },
                "RequestId": "mock-request-id"
            }
        }

        original_secret_id = CONFIG["secret_id"]
        CONFIG["secret_id"] = "invalid-secret-id"

        try:
            mock_request.post(CONFIG["api_url"], json=mock_response)
            result = delete_placement_group([CONFIG["valid_placement_group_id"]])
            assert "Response" in result
            assert "Error" in result["Response"]
            assert result["Response"]["Error"]["Code"] == "AuthFailure.UnauthorizedOperation"
        finally:
            CONFIG["secret_id"] = original_secret_id


def run_tests():
    """启动测试的函数"""
    # 打印配置信息用于调试
    print("测试配置信息:")
    for key, value in CONFIG.items():
        print(f"{key}: {value if key != 'secret_key' else '****'}")

    # 运行所有测试
    pytest.main([__file__, "-v"])


if __name__ == "__main__":
    run_tests()    